1021201313240 has 64 divisors (see below), whose sum is σ = 2326990982400. Its totient is φ = 403280560512.

The previous prime is 1021201313239. The next prime is 1021201313263. The reversal of 1021201313240 is 423131021201.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4738469 + ... + 4949291.

It is an arithmetic number, because the mean of its divisors is an integer number (36359234100).

Almost surely, 2^{1021201313240} is an apocalyptic number.

1021201313240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021201313240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1163495491200).

1021201313240 is an abundant number, since it is smaller than the sum of its proper divisors (1305789669160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1021201313240 is a wasteful number, since it uses less digits than its factorization.

1021201313240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212376 (or 212372 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1021201313240 its reverse (423131021201), we get a palindrome (1444332334441).

The spelling of 1021201313240 in words is "one trillion, twenty-one billion, two hundred one million, three hundred thirteen thousand, two hundred forty".